Changes in Ecclesiastical Jurisdictions in Austria 🇦🇹

Date	Change
250	Metropolitan Archdiocese of Lauriacum was established
250	Metropolitan Archdiocese of Tiburnia was established
300	Diocese of Virunum was established
400	Diocese of Juvavo was established
482	Diocese of Juvavo was suppressed
500	Diocese of Aguntum was established
500	Metropolitan Archdiocese of Lauriacum was suppressed
590	Diocese of Virunum was suppressed
600	Diocese of Aguntum was suppressed
600	Metropolitan Archdiocese of Tiburnia was suppressed
696	Abbacy nullius of Stift Sankt Peter Salzburg was restored (from former Diocese of Virunum)
739	Abbacy nullius of Stift Sankt Peter Salzburg was promoted as Diocese of Salzburg (lost territory to establish Diocese of Freising)
798.04.20	Diocese of Salzburg was promoted as Metropolitan Archdiocese of Salzburg (with suffragan sees Brixen, Freising, Neuburg, Passau and Regensburg)
1071.03.06	Diocese of Gurk was established (from Metropolitan Archdiocese of Salzburg and became suffragan of Salzburg)
1131	Metropolitan Archdiocese of Salzburg lost territory to Diocese of Gurk
1218.06.22	Diocese of Seckau was established (from Metropolitan Archdiocese of Salzburg and became suffragan of Salzburg)
1227	Territorial Abbacy of Wettingen-Mehrerau was established
1228.05.10	Diocese of Lavant was established (from Metropolitan Archdiocese of Salzburg and became suffragan of Salzburg)
1469.01.18	Diocese of Wien was established (from Diocese of Passau and became suffragan of Salzburg)
1469.01.18	Diocese of Wiener Neustadt was established (from Metropolitan Archdiocese of Salzburg and became suffragan of Salzburg)
1722.06.01	Diocese of Wien was promoted as Metropolitan Archdiocese of Wien
1778	Metropolitan Archdiocese of Salzburg lost territory to Diocese of Brixen
1785.01.28	Diocese of Linz was established (from Diocese of Passau and became suffragan of Wien)
1785.01.28	Diocese of Sankt Pölten was established (from Diocese of Passau, from the suppressed Diocese of Wiener Neustadt and became suffragan of Wien)
1785.01.28	Diocese of Wiener Neustadt was suppressed (to Metropolitan Archdiocese of Wien and to establish Diocese of Sankt Pölten)
1786.04.29	Diocese of Leoben was established (from Metropolitan Archdiocese of Salzburg and Diocese of Passau and became suffragan of Salzburg)
1787	Diocese of Lavant lost territory to Diocese of Gurk
1787	Metropolitan Archdiocese of Salzburg lost territory to Diocese of Gurk and Diocese of Seckau
1803	Metropolitan Archdiocese of Salzburg lost territory to Diocese of Brixen
1807	Metropolitan Archdiocese of Salzburg exchanged territory with Diocese of Passau
1813	Metropolitan Archdiocese of Salzburg lost territory to Diocese of Passau
1822	Metropolitan Archdiocese of Salzburg lost territory to Diocese of Passau
1857.05.20	Diocese of Lavant lost territory to Diocese of Gurk
1857.11.26	Diocese of Leoben was suppressed (to Diocese of Seckau)
1922.05.18	Apostolic Administration of Burgenland was established (from Diocese of Győr and Diocese of Szombathely)
1925.12.11	Apostolic Administration of Innsbruck–Feldkirch was established (from Diocese of Brixen)
1933.02.20	Diocese of Gurk lost territory to Metropolitan Archdiocese of Udine
1937	Metropolitan Archdiocese of Wien lost territory to Diocese of Brno
1945.10.03	Ordinariate of Ordinariat d’Autriche de rite oriental (Eastern Rite) was established
1959.02.21	Military Vicariate of Austria was established
1960.08.15	Apostolic Administration of Burgenland was promoted as Diocese of Eisenstadt (became suffragan of Wien)
1962.03.05	Diocese of Lavant was suppressed (to establish Diocese of Maribor and united to Diocese of Maribor)
1963.04.22	Diocese of Seckau was renamed as Diocese of Graz–Seckau
1964.08.06	Apostolic Administration of Innsbruck–Feldkirch was promoted as Diocese of Innsbruck–Feldkirch (became suffragan of Salzburg)
1968	Titular Episcopal See of Aguntum was restored
1968	Titular Metropolitan See of Lauriacum was restored
1968	Titular Metropolitan See of Tiburnia was restored
1968	Titular Episcopal See of Virunum was restored
1968.12.08	Diocese of Feldkirch was established (from Diocese of Innsbruck–Feldkirch and became suffragan of Salzburg)
1968.12.08	Diocese of Innsbruck–Feldkirch was renamed as Diocese of Innsbruck (lost territory to establish Diocese of Feldkirch)
1986.07.21	Military Vicariate of Austria was promoted as Military Ordinariate of Katholische Militärseelsorge Österreich
1989	Titular Episcopal See of Wiener Neustadt was restored
2014.11.14	Diocese of Sankt Pölten lost territory to Metropolitan Archdiocese of Wien